284 / Super Abrasives www.youtube.com/NortonAbrasivesEMEA SUPER ABRASIVES PRODUCT SELECTION ASD 151 R 75 B99 ABRASIVE TYPE GRIT SIZE GRADE CONCENTRATION BOND HOW TO READ A SPECIFICATION GRIT SIZE The grit size selection depends on the required stock removal rate and the required surface finish. ABRASIVE TYPE Both diamond & CBN have distinctive characteristics that meet the most demanding applications. ASD: Synthetic diamond, armoured, high quality, versatile. CB: Cubic boron nitride, armoured, durable. INTRODUCTION Diamond is the hardest material known to man, closely followed by Cubic Boron Nitride (CBN). As a result of their hardness these materials are used extensively in the most demanding precision grinding, slicing, and cutting applications. Super Abrasive wheels use diamond and CBN technology to cut demanding materials such as carbide, high speed steel, ceramics, and glass. Norton provides ultimate, high performance Super Abrasive solutions for the cutting tools industry, offering products specifically designed to deal with the hardest and most challenging materials. CONCENTRATION Indicates the amount of Super Abrasive grits in the wheel. For CBN wheels the concentration number is included in the grade (Q=50, T=75, W=100, Z=125), concentration 100~4,4 ct/cm³, & accordingly 50~2,2 ct/cm³. The optimum concentration depends upon the application. BOND The element in a grinding wheel that holds the diamond or CBN grains together. GRIT SIZE Size of the Super Abrasive particles according to FEPA standards. The smaller the number, the finer the grit size. GRADE Refers to the degree of durability of the wheel, progressing alphabetically from A (softest, least durable) to Z (hardest,most durable). EUROPEAN (FEPA) SIZE U.S. STANDARD US NORTON GRIT SIZE [MESH] MESH DIAMOND CBN 1182 16/20 16 – 852 20/30 24 24 602 30/40 36 36 501 35/40 – – 427 40/50 46 46 301 50/60 60 60 251 60/70 - - - 50/80 80 80C 252 60/80 100 80 213 70/80 - - 181 80/100 105 100 - 80/120 100S 120C 151 100/120 110 120 126 120/140 120 150 107 140/170 150 180 91 170/200 180 220 76 200/230 220 230 64 230/270 240 240 54 270/325 320 320 46 325/400 400 400 APPROXIMATE EUROPEAN (FEPA) SIZE NOMINAL MICRON SIZE NORTON GRIT SIZE [MESH] M63 40/60 – M40 30/40 500 M25 20/30 – M16 10/20 600 M10 6/12 800 M6,3 4/8 – M4,0 2/4 – M1,0 0/2 – CONCENTRATION The concentration influences the stock removal rate and the geometry of the workpiece. DIAMOND 50/75/100/125 CBN Q/T/W/Z SUPER ABRASIVES
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